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Fencer Intel
low 3.3

CVE-2012-3954 json

Multiple memory leaks in ISC DHCP 4.1.x and 4.2.x before 4.2.4-P1 and 4.1-ESV before 4.1-ESV-R6 allow remote attackers to cause a denial of…

published 2012-07-25 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-3898

cvss
3.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.3%
EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Multiple memory leaks in ISC DHCP 4.1.x and 4.2.x before 4.2.4-P1 and 4.1-ESV before 4.1-ESV-R6 allow remote attackers to cause a denial of service (memory consumption) by sending many requests.

Patch / fix

  • isc-dhcp Debian 13, Debian 12 4.2.4-2

debian advisories DEBIAN-CVE-2012-3954

  • dhcp RHEL 6 12:4.1.1-31.P1.el6_3.1
  • dhclient RHEL 6 12:4.1.1-31.P1.el6_3.1
  • dhcp-common RHEL 6 12:4.1.1-31.P1.el6_3.1

red hat advisories RHSA-2012:1141

  • dhcp openSUSE Tumbleweed 4.3.3.P1-3.1

opensuse advisories openSUSE-SU-2024:10358-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-3954 updated cvss 3.3

dhcp: two memory leaks may result in DoS

  • Red Hat Enterprise Linux Desktop (v. 6) dhcp 4.1.1-31.P1.el6_3.1, dhclient 4.1.1-31.P1.el6_3.1, dhcp-common 4.1.1-31.P1.el6_3.1 Red Hat Enterprise Linux Desktop Optional (v. 6) dhcp 4.1.1-31.P1.el6_3.1 Red Hat Enterprise Linux HPC Node (v. 6) dhcp 4.1.1-31.P1.el6_3.1, dhclient 4.1.1-31.P1.el6_3.1, dhcp-common 4.1.1-31.P1.el6_3.1 Red Hat Enterprise Linux HPC Node Optional (v. 6) dhcp 4.1.1-31.P1.el6_3.1 Red Hat Enterprise Linux Server (v. 6) dhcp 4.1.1-31.P1.el6_3.1, dhclient 4.1.1-31.P1.el6_3.1, dhcp-common 4.1.1-31.P1.el6_3.1 Red Hat Enterprise Linux Server Optional (v. 6) dhcp 4.1.1-31.P1.el6_3.1
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) dhcp 4.1.1-31.P1.el6_3.1, dhclient 4.1.1-31.P1.el6_3.1, dhcp-common 4.1.1-31.P1.el6_3.1 Red Hat Enterprise Linux Workstation Optional (v. 6) dhcp 4.1.1-31.P1.el6_3.1
    fixed: vendor fix RHSA-2012:1141
  • Red Hat Enterprise Linux 5 dhcp
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.33% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 3.3 AV:A/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-399 Resource Management Errors

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.